Dictionary - screen refresh timeout

[lvu]

When using T9 to search for a word on the page, every button pressed leads to screen refresh, which takes some time. It must be possible to add a customizable delay between keystrokes, during which the screen is not refreshed, to allow one to enter some T9 characters quickly.

[Buggins]

Instead of timeout before screen update, lazy screen update is implemented.

Difference from method requested by submitter: most likely, if '12345' is entered, first keypress '1' would refresh screen immediately, but the rest '2345' will be updated at once (if entered fast enough).